Improvement in combined fire-pot and water-heater



v E. P. DO'Y'EN-q Combined Fire-Pot and Water-Heater.

Patented Nov 6,1877

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ll ermsl FHOTO-LITHOGRIFHER: WASHINGTON o c UNITED STATES PATENT OFFICE.

ERASMU S P. DOYEN, OF PORTLAND, MAINE.-

IMPROVEMENT IN COMBINED FIRE-POT AND WATER-HEATER.

Specification forming part of Letters Patent No. 196,884, dated November6, 1877; application filed r March 31, 1877.

To all whom it may concern:

- that the following is a full, clear, and exact description thereof,which will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to the let ters of reference marked thereon, which form a part ofthis specification, and in which- Figure l is a sectional view of afurnace having my improved water fire-pot. Fig. 2 is a similar view,showing a fire-pot of a somewhat modified construction; and Fig. 3 is asectional view of a building in which an upper fioor is arranged to beheated by the water from my improved fire-pot.

Similar letters of reference indicate corresponding parts in all thefigures.

The principle of my invention consists in the construction of a waterfire-pot, to be ap plied to furnaces in place of the ordinary lining offire-brick, and in the connection of said fire-pot, by a suitable systemof pipes, with radiators arranged in upper rooms of the house; theobject being to'economize heat, by heating said upper rooms with thewater from the fire-pot, while at ,the same time the hot-air-pipe systemof heating rooms may be carried into execution, in the usual manner, forthe purpose of heating other rooms of the house.

In the drawings hereto annexed I have shown two different constructionsof my improved fire-pot.

A is a double cylinder, closed at both ends, as shown at a a. The walls11 b of the inner cylinder form the fire-pot of the stove or furnace B,in which it is arranged.

The cylinder, which is preferably made of heavy sheet-iron, is preventedfrom being injured by excessive heat by the water with which the space 0between the two cylinders is filled.

O is a pipe leading from the upper end of the cylinder A to theradiators D in the room or rooms above the one in which the furnace orstove is located.

E is the return-pipe, through which the water, after completing thecircuit of the radiators, is returned to the bottom of the waterspace incylinder A.

ter placing in the fire-pot, and conduit and radiator pipes, and water,in any suitable quantity, the fire in the stove or furnace is started.As the water in the fire-pot becomes heated, it ascends through pipe 0,thus making room for the cold water which enters from pipe E. The hotwater passes through the pipes of the radiators, thus expending its heatinwarm ing the rooms in which the radiators are placed. After making thecircuit of the radiators, and havingbecome comparatively cold,

it enters the return-pipe E, which conducts it back to the fire-pot.

Instead of making the fire-pot a double cylinder of sheet metal, it may,as shown in Fig. 2, be made of iron pipe, coiled into a cylindricalshape. The upper end of the coil of pipe is then connected with the pipe0, and the lower end with pipe E, when the operation is exactly the sameas'in the former case. The firepot is formed by the inside of the coil.

It is obvious that my invention may be subjected to variousmodifications in the detailed construction of the fire-pot, itsarrangement within a furnace, and various other details.

I do not, therefore, limit myself to the precise form or forms hereinshown and described, but

H aving thus described my invention, I claim and desire to secure byLetters Patent of the United States- The combination, with a hot-airfurnace, of a fire-pot adapted to serve as a reservoir for water, andthe system of pipes G E, radiators D, and expansion-tank F,substantially as described, for the purposes herein shown and specified.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two witnesses.

ERASMUS P. DOYEN. Witnesses:

JOSEPH A. LooKE, IRA S. LooKE.

